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How to save a life with 2 grams of filament?

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Improvising! That’s what you do when you have limited resources in rural areas, such as in Masanga Hospital Sierra Leone. You look at what you do have and try to come up with the best possible solution. So what to do if you’re having trouble using your oxygen concentrator to generate enough liters per minute to maintain and bring your patient’s saturation to the desired level? You make sure you can couple the oxygen concentrator with another oxygen concentrator. How do you do that? Looking for a coupling piece in one of the departments, technical areas, or in the inventory. And if such a coupler is nowhere to be found? We 3D-print one!